Control over the balls. If lower PSI makes a team better, the he's probably used to filling up the balls like the Goodyear blimp because the bears are awful.

The under inflated balls would be a better advantage in the 40-50 degree weather when an official weighted ball would be more like a rock, warm weather in Glendale wouldn't be that significant though a ball slightly easier to catch would make a difference. The ability to not throw as far may be offset by the elevation in Glendale. If I'm not mistaken, the are 2nd highest elevated pro city after the mile high though its a distant second.

Who knows, but it certainly is an advantage in that type of outdoor weather, especially if the other team is playing with a different ball PSI wise.